Loom shuttle box



Aug. 25, 1942. l w. H. BAHAN' LOOM 'SHUTTLE BOX Filed Ma y 24, 1 941 2Sheets- Sheet 1 :m Y- m M m5 un 3 m n u 5 u. e n m H" a Aug. 25, 1942.w. H. BAHAN- LOOM SHUTTLE BOX Filed May 24, 1941 2 Sh eits-Sheet- 2Enbentor: WILLIAM H. BFJHHN each time it enters Patented Aug. 25, 1942UNHTED STATES PATENT OFFIQE LOOM SHUTTLE BOX William H. Bahan,Greenville. S. 0. Application May 24, 1941, Serial No. 395,041

2 Claims.

This invention relates to improvements in a shuttle box for looms andmore especially to a novel means for applying friction to the sides ofthe loom shuttle as it enters the box.

In most conventional shuttle boxes, there is a tendency for the shuttleto rebound a certain amount after its momentum has been dissipated as aresult of engaging the picker and the sidewalls of the box. The amountof rebound largely depends upon the tightness of the box and also uponhow efliciently the box serves as a checking means. Therefore, it hasbeen very difificult to stop the shuttle in the same position the box,thereby resulting in a variation in the impact delivered by the pickerwhen the shuttle is expelled. This variation of impact often causesmispicks, pick-outs and other imperfections in the woven cloth.

.It is an object of this invention to provide a shuttle box which willeffectively engage the shuttle as it enters the box and stop the same inpractically the same position each pick of the loom. The box is equippedwith an improved back binder capable of exerting an initial checkingaction as the shuttle enters the box and an increased secondary checkingaction when the shuttle progresses farther into the box. This increasedsecondary checking action serves to stop the shuttle upon each pick inthe same position relative to the picker, thus insuring uniform impactswhen the shuttle is expelled. The present invention also replaces theconventional check strap which encircles the picker stick at a pointbelow the lay of the loom. This check strap has heretofore been employedto provide the secondary checking effect which is now incorporated bythe applicant in the improved shuttle box.

It is another object of this invention to provide a shuttle box of theclass described having a novel means for varying the width of the boxand thus effectively controlling the checking effect offered to theincoming shuttle.

Some of the objects of the invention having been stated, other objectswill appear as the de-- scription proceeds, when taken in connectionwith the accompanying drawings, in which Figure 1 is a plan view of oneend of the lay of a loom illustrating my improved shuttle box;

Figure 2 is a front elevation of Figure 1;

Figure 3 is a rear elevation of Figure 1;

Figure 4 is a vertical transverse sectional view taken along the line4-4 in Figure 3 Figure 5 is an exploded isometric view showing the partswhich comprise the back of the shuttle box;

Figure 6 is an exploded isometric view observing the parts shown inFigure 5 from a different angle.

Referring more particularly to the drawings, the numeral [0 denotes theend portion of a loom lay having secured to the upper portion thereof alay plate II. The lay ID has a longitudinal slot l2 cut therein, whichslot coincides with a similar slot M in the race plate thereabove. Inthe slots l2 and I4, a picker stick I5 is adapted to oscillate back andforth to receive and expel a shuttle l6 into and from the shuttle box,the upper end of said stick having a picker l1 fixed thereon whichserves to engage the nose of the shuttle in receiving and expelling thesame.

The race plate II has mounted thereon, a suitable box front 20, said boxfront having a lining 2| covering one face thereof. This lining 2| formsone side of the shuttle box and is adapted to be engaged by one side ofan incoming or outgoing shuttle I6. The box front 20 also has ahorizontally extending flange 24 which rests upon the top of the raceplate II, and serves as a base. This flange has suitable slots 25 neareach end of the box front, which slots are adapted to have restrictedportions 26 of bolts 27 penetrate the same. Each of the bolts 2! extendsdownwardly through the race plate and has a nut 29 threadably secured onthe lower end thereof. By tightening the nut 29, the enlarged headportion 28 of the bolt 21 will be clamped down on top of the outstandingflange 24 of the box front 20 to thereby hold the box front in positionon the race plate. The length of the slots 25 in the flange 24 issufficient to permit the box front to be adjusted laterally of the raceplate a substantial amount when the nuts 29 are loosened.

In order to hold the box front 29 in adjusted position, each of thebolts 2'! has a set screw 34 threadably penetrating the same. One end ofeach of the set screws is adapted to contact the intermediate portion ofthe box front 29 and thereby hold the box front in position against anyoutward pressure which might be exerted by the side of an incoming oroutgoing shuttle Hi. It is therefore seen that this improved box fronthas means for clampingly adjusting the same into engagement with the topof the race plate and also means carried by the clamping means forholding the box front in the adjusted 2 position against lateralpressure exerted by the shuttle.

The lay I9 of the loom and the associated shuttle box is carried by asuitable loom sword 39. The upper portion of this loom swordoscillatably supports a dagger rod 49 upon which a suitable dagger 4| ismounted. The free end of dagger 4| moves back and forth with the lay andis held in an elevated position relative to a stopping mechanism, notshown, when the loom is functioning in the proper order. But when ashuttle fails to become properly boxed, the free end of this dagger willnot and it will engage the stopping mechanism 'to stop the loom. The rod49 is bent substantially.

at right angles to the longitudinal axis of the lay at a point beneaththe shuttle box thus forming an end portion 49a, and on this bent end, asuitable upstanding lever arm 45 is fixedly secured by any suitablemeans such asset screws 45. The upper free end of thelever 45 is nor--mally pressed into engagement with a suitable wearing surface 41 on thefree end of a back binder 43, by means of conventional torsion spring 44(Figure 3). The binder is pivoted at the outer end of the shuttle box toa bolt 49, said bolt having its lower end secured in the race plate II,and having its upper end secured in the outer end of back boxplate 50.This back box plate has its inner end secured to a shuttle box wallplate as at 52. The wall plate, in turn, is secured to the upper endofthe lay sword 39 by means of a suitable bolt 53. When the shuttle box isempty, the free end of binder 49 is pressed against the outside of wallplate 5! by the upper end of lever 45. By observing Figures 1, 5 and 6,it will be seen that the inner end of the back binder 48, that is theend nearest the loom sword, has one face theteof lined with a suitablewearing surface 54, against which the side of the shuttle i6 is adaptedto engage as it initially enters the shuttle box. It will also be notedthat the back binder 43 has a vertically disposed hole 49a in one endthereof through which thebolt49 is adapted to fit when the'parts are inthe position shown in Figures 1 and3. The back binder 48, excepting themodification hereinafter explained, is very similar to the conventionalback binderin common use today on looms, except the length of thewearing surface 54 is substantially shorter than the wearing surfacecustomarily employed.

The binder 48 has a recess 5'! out therein at a point intermediate itsends, which is adapted to receive the free 'endof a second pivotedbinder broadly designated by the reference character 58. This binder 58comprises a U-shaped'strap member 59' having a vertically disposed hole69 in one end thereof, said hole being penetrated by a suitableshouldered bolt 6|. The lower end of the bolt 6| has a restrictedportion Bia. which is threadably embedded in a bracket 62, said bracket62 being secured to the side of lay I9 by means of bolt 63. Theintermediate portion of the second pivoted binder 58 has a suitablewearing surface 65 secured to' the inside face thereof, that is the facewhich is disposed on the opposite side of the shuttle box from the linin2| of the box front 29. This wearing surface 65 cooperates with thewearing surface 54 on the first-named binder 48. When the shuttle hasmoved all of the way into the shuttle box both of the linings orfriction surfaces 54 and 65 engage one-side of the shuttle and press thesame against the lining 2| of the box front.

be elevated sufficiently end of the spring .the loom sword 39 andnormally rests upon the free end of the first pivoted member 48. The

In order to normally cause the free end of the second pivoted binder 58to project inwardly through the recess 51 so that the wearing surface 65will serve to retard the incoming shuttle, a suitable resilient meanssuch as a leaf spring 66 has one end thereof secured to the free end ofstrap member 59 by any suitable means such as a bolt 61. This bolt 61projects through the free end of the member 59, and the projecting endof the bolt is adapted to contact the outside of thefirst pivoted member48 as at 48a when the free end of the second pivoted member 48 has movedinwardly the maximum amount. The free 66 projects inwardly towardintermediate portion of the spring 66 is connected to the intermediateportion of the member .59 by means of suitable bolt 69 and nuts 10. Bythe manipulation of the nuts 10, the amount of pressure initiallyexerted .by the free end of spring 65 upon the freeend of the firstpivoted member 48 may be yaried.

It is thereforeseen that when the shuttle l6 moves into the shuttle. boxto substantially the position shown in Figure l, the lining 54 of thefirst pivoted binder 48 will be engaged by .the base portion of the noseof the shuttle. This will serve as an initial retarding means to checkthe momentum of the shuttle. When the shuttle moves still farther to theleft, than is shown in Figure l, the side of the shuttle will alsoengagethe wearing surface .65 on the second pivoted binder 58. This wearingsurface will serve as an additional checking means. Also when theshuttle engages the lining 54, the first pivoted binder 48 will berotated outwardly away from the center of the shuttle box about itspivot point 49. When the shuttle is completely boxed, thesecond pivotedmember will also be caused to rotate outwardly from the center of thebox about its pivot point Gl. The outward movement of the second pivotedmember will transmit additional pressure to the free end of thefirstpivoted member by means of the leaf spring 65. When it is desired tovary the amount of pressure transmitted by the spring, it is onlynecessary to manipulate the nuts 10 as stated above.

' In the drawings and specification, there has been set forth apreferred embodiment of the invention, and although specific terms areemployed, they are used'in'a generic and descriptive sense only and notfor purposes of limitation, the scope of the invention being set forthin the appended claims.

I claim:

'1. In a shuttle box for loom lays, said box being provided with a boxfront and a box back be.- tween which the shuttle is adapted to restwhenboxed, said box pack comprising a perforated binder pivotally secured tothe lay and having its free end extending inwardly toward the m andhaving spring means acting thereon, for exerting lateral pressure upontheshuttle as it enters the box, a second binder pivotally secured tothe lay and having its free end extending outwardly from the loom, thefree end of said second binder being adapted to penetrate theperforation in said first binder and exert additional lateral pressureupon the shuttle after it advances to a predetermined point in the box,and means pivotally mounted on the lay for yieldingly transmitting theimpact received by the second binder to the free end of the firstbinder.

2. In a loom having a lay provided with a shuttle box on each end forreceiving the shuttle at each end of its travel, said shuttle boxcomprising a box front and a back binder said binder being pivoted atthe outer end of the lay and having spring means normally urging thefree end thereof inwardly against the incoming shuttle, said back binderhaving an opening therein in the end nearest its pivot, a secondarybinder pivotally secured to the lay of the loom and projecting throughsaid opening, spring means extending from the secondary binder to thefree end portion of the back binder, whereby the pressure which isapplied to the secondary binder by an incoming shuttle will betransmitted to the free end of the back binder to exert further pressureon the side of the shuttle to arrest the same.

WILLIAM H. BAHAN.

